from flask import render_template, session, current_app, g, abort, jsonify, request

from info import db, constants
from info.models import User, News, Comment, CommentLike
from info.utils.common import user_login_data
from info.utils.response_code import RET
from . import news_blu




@news_blu.route('/comment_like',methods =['POST'])
@user_login_data
def comment_like():
    """
    评论点赞
    """
    user = g.user
    if not user:
        return jsonify(errno=RET.SESSIONERR,errmsg = "用户未登录")

    # 1.获取参数
    comment_id = request.json.get("comment_id")
    news_id = request.json.get("news_id")
    action = request.json.get("action")


    # 2.校验参数
    if not all([comment_id,news_id,action]):
        return jsonify(errno=RET.PARAMERR,errmsg = "参数错误")

    if action not in ['add','remove']:
        return jsonify(errno=RET.PARAMERR,errmsg = "参数错误")


    try:
        comment_id = int(comment_id)
        news_id = int(news_id)
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno=RET.PARAMERR,errmsg = "参数错误")


    try:
        comment = Comment.query.get(comment_id)
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno=RET.DBERR,errmsg = "数据查询错误")

    if not comment:
        return jsonify(errno=RET.NODATA,errmsg = "评论不存在")


    if action=='add':
        comment_like_model = CommentLike.query.filter(CommentLike.user_id == user.id,CommentLike.comment_id==user.create_id).frist()

        if not comment_like_model:
            # 点击评论
            comment_like_model = CommentLike()
            comment_like_model.user_id=user.id
            comment_like_model.comment_id = comment_id
            db.session.add(comment_like_model)
            comment_like_model +=1
    else:
        # 取消评论
        comment_like_model = CommentLike.query.filter(CommentLike.user_id == user.id,CommentLike.comment_id == user.create_id).frist()

        if comment_like_model:
            comment_like_model.delete()
            comment_like_model -=1

    try:
        db.session.commit()
    except Exception as e:
        db.session.rollback()
        current_app.logger.error(e)
        return jsonify(errno=RET.OK,errmsg = "OK")







@news_blu.route('/news_comment',methods =['POST'])
@user_login_data
def comment_news():
    """
    评论新闻或回复新闻
    :return:
    """
    user = g.user
    if not user:
        return jsonify(errno=RET.SESSIONERR,errmsg = "用户未登录")

    # 1.取参赛
    news_id = request.json.get("news_id")
    comment_content = request.json.get("comment")
    parent_id = request.json.get("parent_id")

    # 2.判断参数
    if not all([news_id,comment_content]):
        return jsonify(errno=RET.PARAMERR,errmsg ="参数错误")

    try:
        news_id = int(news_id)
        if parent_id:
            parent_id = int(parent_id)
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno=RET.PARAMERR,errmsg = "参数错误")

    # 查询新闻，并判断新闻是否存在
    try:
        news = News.query.get(news_id)
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno=RET.DBERR,errmsg = "数据查询错误")

    if not news:
        return jsonify(errno=RET.NODATA,errmsg = "未查询到新闻数据")


    # 3.初始化一个评论模型，并且赋值
    comment = Comment()
    comment.user_id = user.id
    comment.news_id = news_id
    comment.content = comment_content
    if parent_id:
        comment.parent_id = parent_id


    # 添加到数据库
    # return的时候需要用到comment的id
    try:
        db.session.add(comment)
        db.session.commit()
    except Exception as e:
        current_app.logger.error(e)
        db.session.rollback()

    return jsonify(errno=RET.OK,errmsg = "OK",data = comment.to_dict())







@news_blu.route("/news_collect",methods = ['POST'])
@user_login_data
def collect_news():
    """
    收藏新闻
    1.接受参数
    2.判断参数
    3.查询新闻，判断是否存在
    :return:
    """
    user = g.user
    if not user:
        return jsonify(errno = RET.SESSIONERR,errmsg = "用户未登录")

    # 1.接受参数
    news_id = request.json.get('news_id')
    action = request.json.get('action')
    # 2.判断
    if not all([news_id,action]):
        return jsonify(errno=RET.PARAMERR, errmsg="参数错误")

    if action not in ["collect","cancel_collect"]:
        return jsonify(errno=RET.   PARAMERR, errmsg="参数错误")

    try:
        news_id = int(news_id)
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno=RET.PARAMERR, errmsg="参数错误")

    # 3.查询
    try:
        news = News.query.get(news_id)
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno=RET.DBERR, errmsg="数据查询错误")

    if not news:
        return jsonify(errno=RET.NODATA, errmsg="未查到数据")


    # 4.收藏与取消
    if action == "cancel_collect":
        # 取消
        if news in user.collection_news:
            user.collection_news.remove(news)

    else:
        # 收藏
        if news  not in user.collection_news:
            # 添加到用户收藏
            user.collection_news.append(news)
    return jsonify(errno=RET.OK, errmsg="成功")






@news_blu.route("/<int:news_id>")
@user_login_data
def news_detail(news_id):
    """
    新闻详情
    ：:param news_id
    :return
    """


    # 查询用户登录信息
    user = g.user
    
    # 右侧的新闻排行的逻辑
    news_list=[]
    try:
        news_list = News.query.order_by(News.clicks.desc()).limit(constants.CLICK_RANK_MAX_NEWS)
    except Exception as e:
        current_app.logger.error(e)

    #  定义一个空的新闻排行的逻辑
    news_dict_li = []
    for news in news_list:
        news_dict_li.append(news.to_basic_dict())

    # 查询数据库
    news = None

    try:
        news = News.query.get(news_id)
    except Exception as e:
        current_app.logger.error(e)

    if not news:
        abort(404)

    # 更新新闻的点击次数
    news.clicks += 1

    is_collected = False

    # if 用户已登录：
    #     判断用户是否收藏当前新闻，如收藏：
    #         is_collected = True
    if user:
        if news in user.collection_news:
            is_collected = True

    comments = []
    try:
        comments = Comment.query.filter(Comment.news_id==news_id).order_by(Comment.create_time.desc()).all()
    except Exception as e:
        current_app.logger.error(e)

    comment_like_ids = []
    if g.user:
        try:

            # 1.查询出当前新闻的所有评论
            comment_ids = [comment.id for comment in comments ]
            # 2.在查询当前评论被那些用户点赞
            comment_likes = CommentLike.query.filter(CommentLike.comment_id.in_(comment_ids),CommentLike.user_id==g.user.id).all()
            # 3.取到所有被点赞的评论id
            comment_like_ids = [comment_like.comment_id for comment_like in comment_likes]
        except Exception as e:
            current_app.logger.error(e)


    comment_dict_li =[]

    for comment in comments:
        comment_dict = comment.to_dict()
        # 代表没有点赞
        comment_dict['is_like'] = False
        if comment.id in comment_like_ids:
            comment_dict['is_like'] = True
        comment_dict_li.append(comment_dict)


    data={
        "user":user.to_dict() if user else None,
        "news_dict_li":news_dict_li,
        "news":news.to_dict(),
        "is_collected":is_collected,
        "comments":comment_dict_li
    }

    return render_template("/news/detail.html",data=data)